1. 15 Mar, 2014 1 commit
  2. 14 Mar, 2014 4 commits
    • Matt Stancliff's avatar
      Fix segfault from accessing array out of bounds · 584052ee
      Matt Stancliff authored
      argc == 2; argv[2] == crash
      584052ee
    • antirez's avatar
      Sentinel: be safe under crash-recovery assumptions. · ed813863
      antirez authored
      Sentinel's main safety argument is that there are no two configurations
      for the same master with the same version (configuration epoch).
      
      For this to be true Sentinels require to be authorized by a majority.
      Additionally Sentinels require to do two important things:
      
      * Never vote again for the same epoch.
      * Never exchange an old vote for a fresh one.
      
      The first prerequisite, in a crash-recovery system model, requires to
      persist the master->leader_epoch on durable storage before to reply to
      messages. This was not the case.
      
      We also make sure to persist the current epoch in order to never reply
      to stale votes requests from other Sentinels, after a recovery.
      
      The configuration is persisted by making use of fsync(), this is
      considered in the context of this code a good enough guarantee that
      after a restart our durable state is restored, however this may not
      always be the case depending on the kind of hardware and operating
      system used.
      ed813863
    • antirez's avatar
      Sentinel: fake PUBLISH command to receive HELLO messages. · 36509402
      antirez authored
      Now the way HELLO messages are received is unified.
      Now it is no longer needed for Sentinels to converge to the higher
      configuration for a master to be able to chat via some Redis instance,
      the are able to directly exchanges configurations.
      
      Note that this commit does not include the (trivial) change needed to
      send HELLO messages to Sentinel instances as well, since for an error I
      committed the change in the previous commit that refactored hello
      messages processing into a separated function.
      36509402
    • antirez's avatar
  3. 13 Mar, 2014 2 commits
  4. 11 Mar, 2014 8 commits
  5. 10 Mar, 2014 18 commits
  6. 07 Mar, 2014 3 commits
  7. 06 Mar, 2014 4 commits